Cutting-tool.



No. 639,377. Patented neu.v I9, |899.-

G. Mel. GRANT. CUTTING TOUL,

tApplication filed June 8 ,L 1899.) (No Model.)

Ilr'rn STATES GEGRGE MCINTYRE GRANT, OF

Pntrniwry rrrcn.

VALLEY SPRINGS, CALIFORNIA.

CUTTING-TOOL.

SPECIFICATION forming part of Letters Patent No. 639,377, dated December19, 1899.

Application filed T R116 8 1899' To all whom t may concern.-

Be it known that I, GEORGE MCINTYRE GRANT, a citizen of the UnitedStates, residing at Valley Springs, in the county of Calaveras and Stateof California, have invented certain new and useful Improvements inCutting-Tools; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to cutters of the type comprising pivoted armscarrying bits at ltheir free ends, levers for forcefully bringing thearms together, and guide mechanism for causing the levers to operatealike.

The purpose of the invention is to improve the general construction,dispose the parts to the best^ possibleadvantage with reference todurability and efficiency, and to provide a tool which can be used fortrimming horses hoofs, dehorning cattle, cutting rods and bolts, and fora variety of purposes requiring a tool of the character aforesaid, easyof operation and satisfactory in result.

For afull understanding of the merits, advantages, and details ofconstruction of the invention, reference is to be had to the followingdescription and the drawings hereto attached.

While the drawings show the preferred embodiment of the invention, it isto be understood that various changes in the form, proportions, andminor details of construction Vmay be resorted to without departing fromthe spirit or sacrificing any ofthe advantages thereof.

In the drawings, Figure l is a side elevation of a cutting-toolconstructed in accordance with and embodying the essential features ofthe invention. Fig. 2 is a vertical central section on the lineXX ofFig. 1. Fig. 3 is a detail view in elevation, the obverse plate of theframe or head being removed and the outer ends of the levers brokenaway.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings bythe sainereference characters.

The head or frame is composed of side plates 1, havingcentrally-disposed vertical Serial No. 719,808. (No model.)

slots 2 and oppositely-located curved slots 3. These plates arecomparatively thin .and are reinforced at their upper and lower ends bybars a and 5, which are secured thereto in any substantial manner. Theupper bars 4 are depressed centrally and constitute yokes, and arethickened at their ends to provide extended bearings for the pins 6,npoin which the levers 7 are mounted and which likewise connect the barsand plates. The side plates l are disposed in parallel relation and arespaced apart a distance to receive the upper or outer ends of the levers7, and diminish in width toward their lower ends. The vertical slots 2are in coincident relation and receive the end portions of the pin 8,which pivot-ally connects the togglelinks 9, by means of which thelevers 7 are connected for simultaneous action.

The arms l0 have their lower ends deliected and overlapped, theoverlapping portions being halved and pivotally connected by means ofthe pin 11, which likewise connects the side plates'and bars 5. Thesearms 10 are arranged between the plates l and are provided at theirupper ends with bits or cutters 12, which may be of any formation,according to the purpose for which the tool is specially constructed.The arms are normally forced apart at their free ends by means of aspring 13, which may be of any approved formation. and which, as shown,consists of a length of wire doubled upon itself and formed centrallywith a coil or eye to receive the pin le, upon Which the spring ismounted, the end portions of the wire diverging and exerting an outwardpressure against the inner edges of the arms. The pin 14, besidesforming asupport for the spring 13, connects the side plates l and thebarst.

The levers 7 have their pivotal ends formed with outer extensions 15,which are apertured to receive the pins 6, the corners or elbows beingrecessed and having wear-blocks or rollers 16 applied thereto, so as toreceive the wear incident to the sliding contact of the levers with theouter edges of the arms 10 when the tool is in operation. Thesewear-blocks or rollers 16 are of hardened steel, and may be applied tothe levers in any manner found most advantageous and economical.

ICO

The toggle-links 9 are provided in pairs and are disposed exterior tothe head or frame and are connected at their upper outer ends with thelevers 7 by means of pins 17, the end portions of which are adapted toenter the curved slots 3, formed in the edges of the plates l near theirupper ends. The inner ends of the toggle-links are connected by the pinS, which is adapted to travel in the vertical slots 2 of the plates l. Aslight space exists between the opposing sides of the links 9 and levers7 to receive the portions of the plates l bordering upon the curvedslots 3.

When the levers 7 are separated at their lower or free ends, the armsl() are forced apart at their free ends by means of the spring 13,thereby admitting of the part to be cut being received between the bitsor cutters l2. Upon moving the free ends of the levers together theelbow portions acting as cams and riding upon the outer edges of thesaid arms press the latter together and canse the bits or cutters toadvance and sever the article received between them. The movement ofthelevers is uniform and the head or Aframe is maintained centrally betweenthem by reason of the toggle-links 9 and their connection with the saidframe by means of the pin 8, operating in the slots 2.

Having thus described the invention, what is claimed as new is- Theherein-described cutting-tool, comprising side plates havingcentrally-disposed vertical' slots and opposite curved slots in theirupper edges, bars reinforcing the upper and lower ends of saidplates,arms located between theplates and pivoted thereto and to eachother at their lower ends and provided with bits at their upper ends, aspring mounted upon a pin connecting the upper bars and eX- erting anoutward pressure upon the said arms and normally holding them separated,levers provided with outer extensions placed between the upper cornersof the plates and pivoted thereto and to the outer ends of the upperreinforcing-bars and provided at their elbows with wear devices,toggle-links embracing the side plates and pivoted to the leversadjacent to their elbows, and a pin connecting the inner ends of thelevers and passing through the vertical slots of the side plates,substantially as and for the purpose specified. In testimony whereof Iaffix my signature in presence of two witnesses.

GEORGE MCINTYRE GRANT. [It s] Witnesses:

JOHN K. PATTEE, J r., F. B. PATTEE.

